CVE-2025-6811
Published: 07 July 2025
Summary
CVE-2025-6811 is a critical-severity Deserialization of Untrusted Data (CWE-502) vulnerability in Mescius Activereports.Net. Its CVSS base score is 9.8 (Critical).
Operationally, ranked in the top 14.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
Deeper analysis
CVE-2025-6811 is a remote code execution vulnerability in Mescius ActiveReports.NET that stems from deserialization of untrusted data in the TypeResolutionService class. The flaw arises from insufficient validation of user-supplied input, allowing an attacker to trigger unsafe deserialization and execute arbitrary code within the context of the affected process. The issue carries a CVSS score of 9.8 and is tracked under CWE-502.
Remote attackers can exploit the vulnerability over the network without authentication or user interaction, provided the target application interacts with the ActiveReports.NET library. Attack vectors depend on how the library is integrated, but successful exploitation grants full control over the process, including the ability to read, modify, or delete data and potentially pivot within the environment.
The issue was reported as ZDI-CAN-25397 and disclosed via Zero Day Initiative advisory ZDI-25-449, which is available at the reference URL for further details on affected versions and recommended actions. The associated EPSS score has remained flat at 0.0262 with no material increase observed since publication.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-20247
Vulnerability details
Mescius ActiveReports.NET TypeResolutionService Deserialization of Untrusted Data Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Mescius ActiveReports.NET. Interaction with this library is required to exploit this vulnerability but attack vectors may…
more
vary depending on the implementation. The specific flaw exists within the TypeResolutionService class. The issue results from the lack of proper validation of user-supplied data, which can result in deserialization of untrusted data. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-25397.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Penetration testing supplies malicious serialized objects, detecting unsafe deserialization and supporting corrective actions.
Evaluation of untrusted data handling (deserialization testing) reveals unsafe processing, which the required remediation process addresses.
Untrusted serialized data can be deserialized and observed inside the chamber, blocking gadget-chain exploitation outside the sandbox.
Validates or rejects untrusted serialized data before deserialization occurs.
Identifies and blocks malicious code introduced through deserialization of untrusted data at system boundaries.
Integrity verification of serialized information can detect tampering before deserialization occurs.
Provenance of associated data allows detection of untrusted sources before deserialization or processing occurs.